func stripExcessSpaces()

in aws_signing_helper/signer.go [547:585]

• 30 lines of code
• 10 McCabe index (conditional complexity)

func stripExcessSpaces(vals []string) {
	var j, k, l, m, spaces int
	for i, str := range vals {
		// Trim trailing spaces
		for j = len(str) - 1; j >= 0 && str[j] == ' '; j-- {
		}

		// Trim leading spaces
		for k = 0; k < j && str[k] == ' '; k++ {
		}
		str = str[k : j+1]

		// Strip multiple spaces.
		j = strings.Index(str, doubleSpace)
		if j < 0 {
			vals[i] = str
			continue
		}

		buf := []byte(str)
		for k, m, l = j, j, len(buf); k < l; k++ {
			if buf[k] == ' ' {
				if spaces == 0 {
					// First space.
					buf[m] = buf[k]
					m++
				}
				spaces++
			} else {
				// End of multiple spaces.
				spaces = 0
				buf[m] = buf[k]
				m++
			}
		}

		vals[i] = string(buf[:m])
	}
}